Anti-rust treatment method for iron-based alloy magnetic powder core

Abstract

The invention discloses an anti-rust treatment method for an iron-based alloy magnetic powder core, and belongs to the technical field of magnetic materials. Insulated iron-based alloy powder is soaked in anti-rust liquid, and the anti-rust liquid can form a film on the surface of the insulated magnetic powder. Thus, the effects of preventing rust, improving the surface insulation quality of the magnetic powder so as to prevent loss deterioration, and improving the formability of the magnetic powder so as to improve the mechanical strength of the powder core are achieved. Then, a green body is formed by pressing and soaked in the anti-rust liquid or the second time, so that an anti-rust film layer and an insulating coating layer, possibly damaged by pressing, on the surface of the green body can be effectively repaired, and the effects of preventing rust and preventing loss from remarkably deteriorating are achieved. By means of the method, the problems that an existing paint spraying rust prevention technology is high in cost and large in environmental pollution, a conventional rust prevention liquid soaking technology cannot achieve long-term and comprehensive rust prevention, and a silane coupling agent rust prevention technology damages the magnetic performance of the powder core can be solved, and surface rust of the iron-based alloy magnetic powder core caused by factors such as high environment humidity and long placement time is effectively prevented.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials, and in particular relates to a method for preventing rust of an iron-based alloy magnetic powder core. Background technique [0002] Common iron-based alloy magnetic powder cores include iron-silicon powder cores, sendust aluminum powder cores, iron-nickel powder cores and pure iron powder cores, which are widely used in power electronic equipment such as active filters, inverters, and uninterruptible power supplies. At present, most magnetic powder cores are prepared by powder metallurgy processes such as insulation coating, press forming and annealing heat treatment, which have the advantages of easy processing and excellent magnetic properties. [0003] However, because most of the soft magnetic powder cores use iron as the main component element, they are prone to rust in the case of humid air or long-term storage, and their corrosion resistance is poor. In order to prevent the ir...

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Problems solved by technology

[0004] In order to solve the problems of high cost, high environmental pollution, long-term and comprehensive anti-rust in the anti-rust liquid immersion process, and damage to the magnetic properties of the powder core by the anti-rust process of the silane coupling agent, etc., it is achieved without affecting the iron-based alloy. Under the condition of the magnetic performance of the magnetic powder core, the anti-corrosion ability of the magnetic powder core can be enhanced and the mechanical strength of the magnetic powder core can be improved. The invention provides an anti-rust treatment method for the iron-based alloy magnetic powder core

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